Spinach Lasagna

Ingredients

• 1 Tbsp. plus 1 tsp. margarine
• 3 c. thinly sliced mushrooms
• 1 Tbsp. plus 1 tsp. olive oil
• 1 c. chopped onions
• 6 garlic cloves, minced
• 1 1/2 c. tomato sauce
• 1 1/2 tsp. salt, divided
• 1 c. canned Italian tomatoes, drained and diced (reserve liquid)
• 1 tsp. oregano leaves
• 1 tsp. basil leaves
• 1/2 tsp. pepper, divided
• 1 bay leaf
• 2 pkg. (10 oz. each) frozen chopped spinach, thawed and drained
• 2 c. part-skim Ricotta cheese
• 1 egg, beaten
• 8 oz. lasagna, cooked
• 11 oz. shredded Monterey Jack cheese